Patent US3650800A successfully refreshed from Google Patents.
US3650800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile products and production thereof
Assignee: Bayer AG
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Filing: 1969-03-24
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Granted: 1972-03-21
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Expires: 1989-03-24
Abstract
Abstract Coated textiles are produced by a process in which 4-rail knitted fabric which is napped on one face is coated on the napped face with a polyurethane and subsequently grained mechanically.
Inventors
- 👤 Martin Reiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:22
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0002; D06N3/0009
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
The process of claim 1 which comprises a. knitting a stable knitted fabric on a 4-rail wrap knitting loom; b. washing tHe knitted fabric; c. heat-fixing the knitted fabric on a tentering frame; d. dyeing the knitted fabric; e. drying the knitted fabric; f. napping the knitted fabric on one face; g. felt calendering the napped fabric; h. coating the napped fabric with a polyurethane coating composition; i. applying a silicone finish to said polyurethane fabric; and j. mechanically graining said coated fabric in axial tembler drier at a temperature of from about 20* C. to about 100* C. for a period of from about 3 to about 10 minutes by rotating said drier in alternate direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |